全地球的 ftp server 可匿名存取的就有 79萬多個

cross

openftp4
This is a list of all (796,578) FTP servers directly connected to port 21 in the IPv4 address space that allow anonymous logins.
The login must be completed in less than 5 seconds to qualify for this list.
How and why this list was created is documented in detail in my blog post Mass-analyzing a chunk of the Internet.
You can do whatever you want with this data.
Consider linking to this repo if you find something interesting or odd.